Toilet stool



FIG. 1 is a perspective view of a toilet stool, showing my new design;

FIG. 2 is a left side elevation view thereof, the right side elevational view being a mirror image thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a top elevation view thereof; and,

FIG. 6 is a bottom elevation view thereof.

The broken lines showing foot pads in FIGS. 1, 3, and 5 and the structural ribbing in FIG. 6 depict environmental matter and form no part of the claimed design. 

CLAIM The ornamental design for a toilet stool, substantially as shown and described. 